Numerical study of charge transfer in H⁺ + He⁺ and He²⁺ + Li²⁺ collisions

The lattice time-dependent Schrödinger equation (LTDSE) and atomic orbital close coupling (AOCC) methods are applied to calculate the charge transfer cross sections for H⁺ + He⁺ and He²⁺ + Li²⁺ collisions in the velocity range of 0.5–4.0 atomic units. The comparison of the results is made with those of other theoretical methods and with measurements. This analysis is used to provide a test of the accuracy of LTDSE and AOCC, and to help establish a consensus of theoretical results in comparison with the measurements for these ion–ion collisions.